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47305
June 11th, 2020 17:00
Installed two new DDR4 2666 sticks of ram but system still shows old ram value of 2400 Dell 5680
I purchased a dell 5680 about a year ago with an i5-9400, (1) 8GB DDR2400 and 1060 3gb gpu. A few months ago I installed a second 8GB DDR2400 stick from Crucial which worked great.
I have now upgraded the GPU to a 1080 ti, upgraded the PSU to a CX750, and also upgraded the ram with two T Force DDR4 2666 sticks of ram. The only issue I am having is that when I check Task Manager > Performance the speed still only says 2400 MHz (same is true in bios). It says two slots are being used, which is correct but speed is still old value of 2400.
Made sure sticks were in proper slots (the white ones) and seated completely.
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speedstep
9 Legend
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47K Posts
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June 12th, 2020 05:00
2400 is the Standard Specification.
XMP is the overclocked Specification.
Ram can say its 2666 compatible but not be XMP.
The system can use XMP ram with a processor that supports XMP and the Bios Supporting XMP.
This is not supported on All processors All Models All Speeds.
Putting Faster Ram in a system that does not support overclocking will NOT make the ram or system run faster.
You are falling victim to the Mhz myth.
The speed rating is commonly labeled in DDR2/3/4 terms such as DDR4-2666.
Along with speed ratings, RAM also has ratings for timing.
This appears as a string of numbers such as 9-9-9-24. These numbers are indicators of latency which is the number of clock cycles it takes your RAM to do things. SPD stands for Serial Presence Detect, meaning that the motherboard expects the RAM to correspond to one of the JEDEC profiles for the configuration expected from that RAM type. XMP profiles are overclock profiles and not all ram supports that.
XMP or Extreme Memory Profiles, is an Intel technology that allows you to change multiple memory settings by simply selecting a different profile, taking advantage of higher than standard memory speeds. This is NOT guranteed for Joes crab shack ram and its NOT Guaranteed for All CPUS and ALL bios and ALL chipsets etc. Its overclocking to speed that is more than standard. It is faster but its not significantly faster meaning you are burning up your ram and cpu for a few percentage points more.
https://www.youtube.com/watch?v=D_Yt4vSZKVk
speedstep
9 Legend
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47K Posts
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June 11th, 2020 17:00
installing faster ram does not make machine faster nor does it change FSB for CPU and chipset.
https://www.intel.com/content/www/us/en/gaming/extreme-memory-profile-xmp.html
XMP requires specific SPD profile , cpu, bios setttings, etc.Your BIOS will read a small chip on your RAM modules called an SPD (serial presence detect) chip to set memory timing and frequencies properly. XMP is an extension of SPD which provides higher frequencies and tighter timings for your memory to run at. It also corrects for the extra voltage required which provides a stable overclock with the click of a button.XMP profiles are required and must be enabled in bios,chipset, cpu etc, to run above industry DDR specifications for your system.
You did not mention what ram or what cpu or what chipset or what bios settings. It is important to know that XMP is available for unlocked processors only. There is no overclocking a locked cpu.
HowDun
4 Posts
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June 11th, 2020 20:00
@speedstep
CPU: 9th gen i5-9400
old ram: (2x8gb) DDR4 2400
new ram: (2x8gb) T Force DDR4 2666
chipset: intel z370
I think chipset was the only thing I missed to mention in OP...sorry. The two DDR4 2400s were removed, the two DDR4 2666 installed in their place, booted up and it still says 2400
speedstep
9 Legend
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47K Posts
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June 11th, 2020 20:00
xmp and overclocking are not supported unless the ram, bios and chipset support it AND the cpu is unlocked.
Dark z supports xmp your ram does not nor is your cpu unlocked
https://www.intel.com/content/www/us/en/gaming/xmp-for-core-processors.html
https://www.teamgroupinc.com/en/product/dark-z-ddr4
HowDun
4 Posts
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June 12th, 2020 05:00
@speedstep
I was reading the setup and spec documentation for my model here
Here is the snippet I was reading:
Slots Four UDIMM slots
Type DDR4
Configurations supported
• 8 GB DDR4 at 2400 MHz (1 x 8 GB)
• 8 GB DDR4 at 2666 MHz (1 x 8 GB)
• 16 GB Dual Channel DDR4 at 2400
MHz (2 x 8 GB)
• 16 GB Dual Channel DDR4 at 2666
MHz (2 x 8 GB)
• 32 GB Dual Channel DDR4 at 2666
MHz (2 x 16 GB)
• 64 GB Dual Channel DDR4 at 2666
MHz (4 x 16GB)
So youre saying that my RAM is advertised at 2666 MHz, but its actually only 2400 until overclocked yet the ram doesnt have the functionality to BE overclocked (sorry Im clearly confused)?? Also why would my manual say 16 gb dual channel DDR4 at 2666 MHz is supported? You mentioned my CPU is locked and shared that link with list of all the processors but I cant find mine (i5-9400). Perhaps I overlooked it but can you show me where you saw my cpu is locked/does not support 2666? I found a link here that says otherwise: https://ark.intel.com/content/www/us/en/ark/products/134898/intel-core-i5-9400-processor-9m-cache-up-to-4-10-ghz.html
Thanks for your replies, I am clearly a novice at this stuff so your help is appreciated
HowDun
4 Posts
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June 12th, 2020 06:00
@speedstep Thanks for all of that information and explanation